Reformed Theology is Biblical Theology. It is central to the christian faith and has never departed from it as you say
That depends on how you define "biblical".
JW, SDS, the prosperity gospel.....they all believe their theology is biblical. And by the standard Reformed theology is "biblical", they meet that definition.
By "biblical" I mean actually in the Word of God (not ideas "based on" the Bible.....Christian fiction is based on Scripture).
It departs from Scripture and the Christian faith. I do not mean it "departed from" as it was never there.
Think about it. Reformed theology holds that the New Covenant is the manifestation 9f God's righteousness through the Law (specifically the moral aspects of the Law).
But the Bible says that it is "the manifestation of God's righteousness apart from the Law:.
Reformed theology is "easy believism". That is perhaps why people find it attractive at first.
But because it is so superficial and shallow it keeps building on its philosophy to create a more complex myth.
Making the myth more detailed and complex does nothing to eliminate its shalliwness.
Reformed Theology is like playing Dungeons & Dragons to study reality. The mythology can be highly developed, mut the more one is drawn into the myth the farther one is drawn from truth.
I can show you what I believe in God's own words.
You and
@Martin Marprelate have to go to your "Dungeon master" to tell you what is "realky" going on because you believe it simply cannot be what God has actually said.